It is by now a common experience that Y2K-projects tend to be complex, time-consuming and risky as well as that they can cause considerable costs. Because they belong to the class of corrective maintenance projects, not too many bene ts can be expected from such projects at a rst sight. But if they are managed in a proper way, the foundation for several important future bene ts can be layed. In...

In the last few years, contributions of the general public in scientific projects has increased due to the advancement of communication and computing technologies. Internet played an important role in connecting scientists and volunteers who are interested in participating in their scientific projects. However, despite potential benefits, only a limited number of crowdsourcing based large-scale...